d ≤ 6
The solution set is {6, 5, 4, 3, 2, 1, 0, –1, –2, ....}
Solution:
Given expression is the inequality.
The inequality is
.
<u>To solve this inequality:</u>

Multiply by 3 on both sides of the inequality, we get


That is the value of d is 6, 5, 4, 3, 2, 1, 0, –1, –2, ....
The solution set is {6, 5, 4, 3, 2, 1, 0, –1, –2, ....}
Hence d ≤ 6.